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Greptile Overview

Greptile Summary

Added a new auto-rerun workflow that automatically retriggers failed Playwright tests on their first failure, helping reduce flakiness impact on CI/CD pipeline.

Key Changes:

• New playwright-auto-rerun.yml workflow listens for Playwright test failures
• Only triggers on first attempt (run_attempt == 1) to prevent infinite loops
• Uses gh run rerun --failed to rerun only failed jobs, leveraging TestDino for test-level optimization
• Includes comprehensive debug logging and validation checks
• Supports manual triggering via workflow_dispatch for testing
• Removed deliberate test failure from streamname.spec.js that was used for testing

Technical Implementation:

• Workflow triggers on workflow_run completion event for "Playwright UI Tests"
• Validates workflow state (completed + failed) before initiating rerun
• Installs GitHub CLI if not present for rerun capabilities
• Proper permissions (actions: write, contents: read) configured

Confidence Score: 4/5

• This PR is safe to merge with low risk - implements a well-bounded auto-rerun mechanism with proper safeguards
• Score reflects solid implementation with appropriate safeguards: only triggers on first attempt to prevent loops, includes comprehensive validation and error handling, and removes test debugging code. Minor concern is the potential for increased CI usage if flaky tests consistently fail-then-pass, but this is an acceptable trade-off for improved developer experience
• No files require special attention - the workflow is well-structured with proper validation logic

Important Files Changed

File Analysis

Sequence Diagram

sequenceDiagram
    participant PT as Playwright UI Tests
    participant GHA as GitHub Actions
    participant AR as Auto-Rerun Workflow
    participant GHCLI as GitHub CLI
    
    PT->>PT: Run tests on PR/push
    alt Tests fail on first attempt
        PT->>GHA: Mark workflow as failed (attempt 1)
        GHA->>AR: Trigger workflow_run event
        AR->>AR: Check if run_attempt == 1
        AR->>AR: Check if conclusion == 'failure'
        AR->>AR: Install GitHub CLI
        AR->>GHCLI: gh run view $RUN_ID
        GHCLI-->>AR: Return run details (status, conclusion, attempt)
        AR->>AR: Validate workflow is completed
        AR->>AR: Validate conclusion is failure
        AR->>GHCLI: gh run rerun $RUN_ID --failed
        GHCLI->>PT: Trigger rerun of failed jobs only
        PT->>PT: TestDino optimizes to run only failed tests
    else Tests pass or attempt > 1
        PT->>GHA: Complete workflow
        Note over GHA,AR: Auto-rerun workflow not triggered
    end
    
    alt Manual testing
        GHA->>AR: workflow_dispatch with run_id
        AR->>AR: Use provided run_id
        AR->>GHCLI: gh run rerun $RUN_ID --failed
        GHCLI->>PT: Trigger rerun
    end

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